Hey Brambo,
Without knowing your pap is a little difficult but I have mine at 4.5 x 2.5mb and it does exactly what you described, very early revs with an arcing backend. Placing my mb so close to pap causes the weightblock to produce "max revs" which creates a earlier read which then in turn creates an arcing backend reaction. Hope this helps...
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Rick Leong
Ten Pins Pro Shop
Track Amateur/Pro Shop Staff
Vise Grip Staff